... sizes and shapes. Material: Mild Steel, Stainless steel, Galvanized, Aluminum, Brass, Copper.Weave and feature: punching and etching , the thickness less ... than 0.5mm, need to be etched.The hole shape: Round, long round, oval, square, diamond, triangle, scale, hexangular, slot etc ... for the purpose of protection and decoration. 2012 HOT !!! excellent quality and reasonable price Round Perforated Metal